1, 2.Argue,debate,discuss imply using reasons or proofs to support or refute an assertion, proposition, or principle. Argue implies presenting one's reasons: The scientists argued for a safer testing procedure; it may also imply disputing in an angry or excited way: His parents argue all the time. To discuss is to present varied opinions and views: to discuss ways and means. To debate is to interchange formal (usually opposing) arguments, especially on public questions: to debate a proposed amendment.